Trolley.



No. 747,106. PATBNTED DEC. 15, 1903.

1v1. J. WILSON.

'TROLLEYi APPLoATIoN FILED SEPT. 2, 1902.

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Patented December 15, 1903.

MILFORD I. WILSON, OF PAINESVILLE, OHIO.

TROLLEY.

SPECIFICATION forming part of Letters Patent No. 747,106, dated December15, 1903.

l' Application filed September 2,1902. Serial No. 121,722. (No model.)

To all whom it may concern.-

Be it known that I, MILFORD J. WILSON, a citizen of the UnitedStates,residin g at Painesville, in the county of Lake and State ofOhio, have invented a certain new and useful Improvement in Trolleys, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawings.

The object of this invention is to provide a trolley which shall beself-oiling, in which the electric contact shallbe of the highestpossible efciency, which shall be simple to construct, durable inservice, andeasily and cheaply repaired when necessary.

The invention may be Vsummarized as consisting of the combinations ofparts to the above end, as hereinafter more fully explained and asdeni'tely set outin the claims.

In the drawings which clearly illustrate my invention, Figure l is aside elevation, and Fig. 2 is a plan, each of these views being partlybroken away to show the cavity in the harp. Fig. 3 is a section 'throughthe axle and set-screws. Fig. is a transverse section on the line 4 4 ofFig. 3. Fig. 5 is a perspective view of the axle alone.

Referring to the parts by letters, A represents the harp, which has aportion et adapted to connect with the pole and a pair of arms ct a. Inthe arms is a cavity a?, which connects across the harp, being of a Uform. This cavity is adapted to carry oil inserted through an opening inthe harp, which is thereafter closed by the fscrew d5. The axle iscarried by the harp and is adapted to receive oil therefrom, ashereinafter explained. The axle is composed of an inner tube B, made ofcopper, and a pair of sleeves B, which snugly embrace the copper tubeand extend inward from each direction. The ends of the bore of thecopper tube are closed by suitable screw-plugs b. Through thecylindrical wall of this tube are formed oilopenings b', communicating`withlargeropeuings b2 in the sleeves B'. These latter openingspreferably carry felt b3 or other oil-ab sorbing material. The axle isheld in place by set-screws D, which screw through the harp, taking intocavities in the sleeves B. Extending upward along the axes of theseset-screws are passage-ways d, communicating by a cross passageway withthe sides of the screw. Openings b5 through the sleeves B and the coppertube aline with the openings d. Now near the forward end of the harpthere is formed across the cavity a2 a wall or partition a3, which maybe cast integrally with the harp and which does not reach to the'extreme height of the cavity, thus leaving a smaller communicatingcavity a4 in the forward end of the harp surrounding the setscrew D.

From the above-described construction it results that whenever thetrolley-pole is drawn downward intoa substantially horizontal positionthe oil in the cavity a2 passes. into the cavity a4, where it isretained by the wall as when the pole is elevated. This oil graduallypasses through the openings cl into the bore of the tube B and thencethrough the openings b to the felt b3. The trolley-wheel E is journaledon the inner portions of the sleeves B,as shown, and is thuscontinuously oiled by the felt b3.

Through the hub e of the trolley-wheel E is an opening e', into whichextends a curved spring F,'which bears upon the central enlarged portionb4 of the copper tube. The spring is snugly held against the copper tubeby having its outer end'taking over a lug e2, formed on the hub, throughwhich lug extends a pin e3 for holding the spring F in place. vBy makingthe tube B of copper I obtain the best possible contact between it andthe spring F. Less pressure is required on the spring than if it boreupon steel, and hence the wear is not so great. The conductivity of thecopper insures the current being carried from the wheel to the harp withthe least possible loss.

In the operation of the trolley the steel sleeves B wear out before thecopper tube, the spring F, or the hub e. These sleeves may be easilyremoved from the copper tube and cheaply replaced. By having theenlargement b4 on the copper tube it will wear a very long time. Thusthe addition of a few extra pairs of steel bushings B during the life ofthe trolley will allow the axle to last for an exceptionally long time.

I claiml. The combination of a trolley-harp having a pair of arms, andan axle extending between, and non-rotatably secured in said arms, saidaxle consisting of a central part B having an annular enlarged portionb4, and the sleeves B B which closely embrace said tube on oppositesides of said enlarged portion thereof, with a trolley-wheel rotatablymounted upon the sleeves B between said harp-arms, an electrical contactdevice carried by said wheel in contact with the enlarged part b4 of thepart B, substantially as and for the purpose speciied.

2. The combination of a trolley-harp having a pair of arms, a tubularaxle B adapted to hold lubricating-oil, extending between andnon-rotatably secured to said harp-arms, two sleeves B' B non-rotatablysecured upon said tubular axle with an intervening space between theirproxim'ate ends, there being oil-delivery openings through said tubularaxle and the tubes B', a trolley-wheel between said harp-arms androtatably mounted upon said sleeves B B', and a spring contact devicecarried by said wheel in contact with that part of the tubular axle Bbetween the proximate ends of said tubes B B', substantially as and forthe purpose specified.

3. The combination of a trolley-harp having a pair of arms in which areoil-receptacles, and a tubular axle extending between and non-rotatablysecured in said arms, there being holes through which the bore of saidaxle is in communication with both oil-receptacles in the harp-arms,said axle consisting of, first, a central tube B having, about midwaybetween its ends, an enlarged portion b4 and having also theoil-openings b', and, second, sleeves B/ which embrace the tube B onopposite sides of the enlarged portion b4,which tubes have theoil-openings b2, with a trolleywheel rotatably mounted upon the sleevesB between the harp-arms, an electrical contact device carried by thewheel in contact with the enlarged portion of the tube B, and plugsclosing the ends of said tube, substantially as and for the purposespecified.

In testimony whereof I hereunto affix my signature in the presence oftwo witnesses.

MILFORD J. WILSON.

Witnesses:

ALBERT H. BATES, B. W. BROCKETT.

